Maxx Model CNC Aluminum Advanced Speed Trigger for M4 / M16 Series Airsoft AEG (Style: E / Titan)

"This review is for the "E Style" trigger. Overall, it's a good trigger compared to the stock ones that come with your gun. I ordered the black trigger but I got sent the silver one instead.

Although it messes with the aesthetic of my gun, functionality is the same. I recommend using it with a mosfet, like a Gate Titan, which I use to maximize the effectiveness of the adjustment screws. I also used some Loctite Blue for the screws

It fits loosely in a Retro Arms gearbox, because the trigger posts are smaller in diameter than the holes in the gearbox.

*Also take into consideration the size of the trigger hole in your lower receiver, as I had to shave a bit off for it to fit since the front screw portion projects too far